ergehenmeng/es-begin

es以window服务方式启动

• elasticsearch-service.bat install 安装服务
• elasticsearch-service.bat start 启动服务

集群说明

建立索引和类型时通过master,之后同步给slave 数据写入时,根据一定的routing规则,将route到集群任意节点,因此写入压力分散到整个集群中

Analyzer组成部分

0或多个character filter + 1个tokenizer + 0或多个token filter组成

• character filter 字符过滤
• tokenizer 文本切为分词
• token filter 分词之后进行过滤

// 自定义数据转换
@Configuration
public class Config extends AbstractElasticsearchConfiguration {

  @Bean
  @Override
  public ElasticsearchCustomConversions elasticsearchCustomConversions() {
    return new ElasticsearchCustomConversions(
      Arrays.asList(new AddressToMap(), new MapToAddress()));       
  }

  @WritingConverter                                                 
  static class AddressToMap implements Converter<Address, Map<String, Object>> {

    @Override
    public Map<String, Object> convert(Address source) {

      LinkedHashMap<String, Object> target = new LinkedHashMap<>();
      target.put("x", source.getCity());

      return target;
    }
  }

  @ReadingConverter                                                 
  static class MapToAddress implements Converter<Map<String, Object>, Address> {

    @Override
    public Address convert(Map<String, Object> source) {

      return address;
    }
  }
}

• IndexOperations defines actions on index level like creating or deleting an index. (类似DDL)
• DocumentOperations defines actions to store, update and retrieve entities based on their id. (DML)
• SearchOperations define the actions to search for multiple entities using queries (类似DQL)
• ElasticsearchOperations combines the DocumentOperations and SearchOperations interfaces. 混合模式